<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            #d1{
                width: 100px;
                height: 100px;
                background-color: red;
                margin: 25px 0 0 25px;
                overflow: hidden;
            }
            #d1>div{
                width: 50px;
                height: 50px;
                background-color: blue;
                margin:25px 0 0 25px;
            }
            #d2{
                width: 50px;
                height:50px;
                border: 4px solid green;
                border-radius: 5px;
                margin-left: 125px;
                padding:50px 0 0 50px;
            }
        </style>

    </head>
    <body>

    <div id="d1">
            <div></div>
        </div>

        <div id="d2">哈喽</div>
    </body>
</html>